201 · Question #203
A BIG-IP Administrator assigns the default http health monitor to a pool that has three members listening on port 80 When the administrator connects to each pool member via the CURL utility, two of th
The correct answer is D. All members online.. The default HTTP health monitor considers a pool member online if it receives any valid HTTP response, so all three members will be marked online despite two returning a 404 Not Found status.
Question
A BIG-IP Administrator assigns the default http health monitor to a pool that has three members listening on port 80 When the administrator connects to each pool member via the CURL utility, two of the members respond with a status of 404 Not Found while the third responds with 200 OK. What will the pool show for member availability?
Options
- AAll members offline.
- BTwo members offline and one member online.
- CTwo members online and one member offline.
- DAll members online.
How the community answered
(40 responses)- A5% (2)
- B3% (1)
- D93% (37)
Why each option
The default HTTP health monitor considers a pool member online if it receives any valid HTTP response, so all three members will be marked online despite two returning a 404 Not Found status.
All members are responding with valid HTTP status codes (200 OK or 404 Not Found), which indicates their HTTP services are active and reachable.
A 404 Not Found status is a valid HTTP response, signifying that the web server is operational and processing requests, therefore the default HTTP monitor will mark these members as online.
A 404 Not Found status is a valid HTTP response, indicating the server is responsive; consequently, the default HTTP monitor will consider all three members online.
The default HTTP health monitor only verifies that the server responds to an HTTP request, regardless of the specific HTTP status code. Both 200 OK and 404 Not Found are valid HTTP responses, indicating the HTTP service is operational on all three members, thus marking them online.
Concept tested: F5 BIG-IP default HTTP health monitor behavior
Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-local-traffic-manager-reference-guide/monitors.html
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